Snapping roll with mating spiral rubber ribs



1952 J. L. AASLAND 8 SNAPPING ROLL WITH MATING SPIRAL RUBBER RIBS Filed Oct. 29, 1948 [r20 an ion 10/922 1:. d's/aim PM (9 PW J Patented Feb. 5, 1952 UNITED STATES PATENT OFFICE SNAPPING .RoLnwI'rH MATING SPIRAL I v RUBBER RIBS I John L. Aasland. Moline, I I I as'siEhtIr to Inter: national Harvester Company," a; corporation of f New Jersey Application October 29, 134s. Serial No. 57,311

This invention relates to new and improved snapping rolls with mating spiral rubber ribs. 3

The problems of designin corn snapping rolls are numerous. Many corn picking 01' corn harvesting machines are now provided with snapping means, but no husking means.

It is therefore a principal object of this invention to provide cooperative corn snapping rolls which will actively husk ears of corn simultaneously with the snapping of the ears from their stalks.

An important object of this invention is to provide means on cooperative snapping rolls for positlvely forwarding the stalks to prevent crowding or congestion of a number of stalks in one position with respect to the cooperative rolls.

Another important object of this invention is to provide positive snapping rolls and effective means associated therewith for performing a husking of the snapped ears of corn.

Another and still further important object of this invention is to provide cooperative snapping rolls having mating spiral ribs and a continuous rubber insert around the apex of both of said spiral ribs to permit easy adjustment of the rolls one to the other and to compensate for irregularities in the depth of the ribs.

Other and further important objects of this invention will become apparent from the disclosures in the following specification and accompanyin drawing.

In the drawing:

Fig. 1 is a top plan view of portions of the cooperative snapping rolls of this invention with a part thereof in section.

Fig. 2 is a sectional view taken on the line 22 of Fig. 1 and showing a corn stalk being fed therethrough.

As shown in the drawing the reference numerals III and I I indicate generally cooperative snapping rolls. These. rolls include substantially parallel cylindrical portions I2 and I3 respectively having wound thereon and rigidly attached thereto mating spiral ribs I4 and I5. The rib I4 is spiraled in/one direction and the rib I5 is spiraled in the opposite direction. The ribs I4 and I5 are adapted for engagement at I6 on a line centrally between the rolls I0 and I I. Adjacent convolutions of adjoining or abutting ribs define a pocket area or space I! between the rolls I0 and II for confining a corn stalk without crushin it and feeding it along the length of the roll by a positive guiding thereof.

As shown in Fig. 2, a corn stalk I8 is shown in one of the pockets I1 and by means of the spiral roam. 01. no s) ribs I4' and I5 the stalk is .moved longitudinally of the rolls Ill and I I. Simultaneously with this rearward movement of the stalk re'cta'ngularly shaped projections I9, 23, '2I and 22 are adapted to move the stalk downwardly between the rolls I0 and II. The projections I9 and 20, and the projections 2| and 22 are diametrically opposed on the rolls I0 and II respectively. As shown in Fig. 2, the projections 2I and 22 are at right angles to the projections I9 and 2!] and the projection 2I is shown in biting engagement with the stalk I8 for causing downward movement of the stalk and an eventual snapping of the ear of corn 23. The rolls I0 and I I turn inwardly toward each other so that the stalk I8 tends to be forced down between the rolls. The projections located between adjacent convolutions of the spiral ribs I4 and I5, are alternately spaced so that only one projection enters the pocket I? at a time and thus engages the stalk on only one side thereof. This insures that the stalk shall not be completely crushed and broken off with an entire loss of corn such as occurs quite frequently in presently used corn snapping rolls. This alternate engagement of the stalk I8 by the biting feeding lugs and the engagement of the stalk on alternately opposite sides at spaced vertical intervals effectively feeds the stalk downwardly and causes a quick snapping of the ear 23 from its attachments at 24 to the stalk I8.

The spiral ribs I4 and I5 in the present invention include channels 25 and 26 respectively which are integrally molded to the cylindrical portions I2 and I3 of the rolls I0 and II. The channels 25 and 26 each are provided with substantially V-shaped openings 21 and 28 within which correspondingly V-shaped rubber strips 29 and 30 are positioned. The rubber strips 29 and 3!] are very similar to a rubber V-belt material and project radially outwardly beyond the outer surface of the spiral channels 25 and 26 so that the operating portions of the ribs are substantially entirely rubber.

As previously stated, the mating ribs forming the pockets I'I cause the forwarding of the stalk along the rolls. The lugs I9, 20, 2| and 22 positively grip the stalk at alternate positions and feed the stalk downwardly between the rolls simultaneously with the feeding of the stalk along the rolls. When the ear of corn 23 arrives at the juncture between the rolls it is sufiiciently large so that it will not pass through the rolls and thus it is snapped from the stalk, whereupon it lies in a position centrally of the rolls and over the cooperative mating spiral ribs I4 and I5. The rubher surfaces 29 and 30 of the ribs are adapted to remove trash and to grip and/ or pinch the husks on the ear and the downward pulling away from the ear causes the husks to be removed. It is thus seen that in addition to effectively performing the snapping operation the rolls of the present invention with the spiral rubber inserts actively husks the ears and permit elimination of separate husking rolls and thus a more economical corn picker.

Numerous details of construction may be varied throughout a wide range without departing from the principles disclosed herein and I therefore do not propose limiting the patent granted hereon otherwise than as necessitated by the appended 15 claim.

What is claimed is:

A pair of cooperative snapping'and husking rolls comprising elongated parallel cylindrical portions, oppositely wound mating spiral ribs attached to and extending over the cylindrical surface of both of the cooperative rolls, said spiral ribs having their convolutions spaced apart to form a corn stalk confining pocket, and resilient JOHN L. AASLAND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 381,748 Armstead Apr. 24, 1888 787,750 Goodhue Apr. 18, 1905 867,035 Hamm Sept. 24, 1907 959,904 Wolfe May 31, 1910 1.641.682 Kruse Sept. 6.. 1927 1,682,143 Paradise Aug. 28, 1928 1,859,800 Schwartz May 24, 1932 2,041,139 Marxman May 19, 1936 2,179,579 Morral et a1 -Nov; 14, 1939 

